USGS 21725-PC (Carboniferous of the United States)

Also known as Sando et al. Buck Spring Loc.14

Where: Carbon County, Wyoming (41.9° N, 107.3° W: paleocoordinates 2.3° N, 36.3° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Ranchester Member (Amsden Formation), Morrowan (323.2 - 318.6 Ma)

• Float from limestone bed 140.5-142.5 ft above base of Amsden Fm.

• bed-level stratigraphic resolution

Environment/lithology: offshore shelf; lithified, lenticular, concretionary, gray, yellow, sandy, cherty/siliceous dolomite and green, red shale

• ranchester: heterogenous sequence of interbedded chery dolomite and limestone, sandstone, and shale. carbonate rocks predominate; thin- to thick-bedded, fine grained to coarsely crystalling, yellowish-gray weathering dolomite and dolomitic limestone are generally much more abundant than thin-bedded, fine- to medium-grained, light-gray to purple weathering limestone. carbonate beds, particularly dolomites, contain abundant gray, brown or jasperoid chert in small nodules, irregular lenses and irregular networks. red and green shale in thin beds and partings are commonly interbedded with the carbonate rocks, particularly in the upper half, and may compose significant thicknesses of the member at some localities. thin beds of fine- to medium-grained, white to pink sandstone occur throughout the member but are most abundant in the upper half. quartz sand is also a minor constituent of some of the carbonate beds. anhydrite was reported as a minor constituent of some dolomite beds.

Reposited in the USGS

• "Collected by W.J. Sando and K.R. Moore, 1964."

Primary reference: W. J. Sando, M., J.r. Gordon, and J. T. Dutro. 1975. Stratigraphy and geologic history of the Amsden Formation (Mississippian and Pennsylvanian) of Wyoming. United States Geological Survey Professional Paper 848A:1-83 [J. Alroy/M. Sommers/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 5682: authorized by John Alroy, entered by Mike Sommers on 15.11.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Antracospirifer occidus
Foraminifera
 Fusulinoidea - Eostaffellidae
Eostaffella sp.
Eostaffella sp. Rauser-Chernousova 1948
 Endothyroidea - Endothyridae
Endothyra sp.
 Archaediscacea - Archaediscidae
Asteroarchaediscus bachkiricus, Asteroarchaediscus sp.
 Palaeotextularoidea - Biseriamminidae
Globivalvulina ex gr. bulloides, Lipinella sp., Biseriella moderata, Biseriella sp.
Lipinella sp.
(nom. nud.)
 Fusulinina - Tuberitinidae
Tuberitina sp., Eotuberitina sp.
 Fusulinina - Pseudoammodiscidae
Pseudoglomospira sp.
 Fusulinina - Earlandiidae
Earlandia sp.
  -
cf. Palaeonubecularia sp.
cf. Palaeonubecularia sp. Reitlinger 1950
Rhynchonellata
 Athyridida - Athyrididae
Composita ovata
Composita ovata Mather 1915
Strophomenata
 Productida - Echinoconchidae
? Echinoconchus sp.
Calcisphaera
  -
Calcisphaera sp.
Calcisphaera sp. Williamson 1880